How to implement waterproofing and anti-corrosion measures for grounding inspection pits?

Design Principles and Implementation of Waterproofing Measures
The waterproofing design of a grounding inspection pit should be based on environmental characteristics and functional requirements, ensuring that the pit and its internal equipment are protected from groundwater and rainwater infiltration. First, the materials selected for the waterproofing layer should be durable and impermeable. Common materials include polyurethane waterproofing coatings, polyethylene waterproofing membranes, and asphalt-based waterproofing materials. Second, the structural design must ensure that there are no leakage paths within the pit, especially at joints and interfaces.
During construction, the waterproofing layer should be laid strictly in accordance with the design drawings and process requirements to avoid defects such as bubbles and damage. After the waterproofing layer is completed, a closed water test should be conducted to verify the waterproofing effectiveness. The drainage system is equally important. Properly designed drainage holes and drains ensure that accumulated water can be drained away promptly, preventing water accumulation within the inspection pit. The waterproofing performance of the pit cover also requires attention. A waterproof and sealed structure should be selected to prevent rainwater from directly entering the pit. Regular inspection and replacement of the pit cover sealing strips should be performed to maintain a good seal.

Material Selection and Process Requirements for Anti-Corrosion Measures
Corrosion protection for grounding inspection pits primarily focuses on protecting the pit material and internal metal components from corrosion. First, pit structures are typically constructed of concrete. To enhance corrosion resistance, the concrete mix ratio should be optimized, and anti-corrosion agents should be added to reduce porosity and increase density. The concrete surface can be coated with an anti-corrosion coating, such as epoxy or polyurethane, to block the intrusion of corrosive media.
Internal metal components, such as grounding conductors and connectors, are often exposed to humid environments and are susceptible to rust. Galvanized steel, stainless steel, or copper should be used, combined with surface anti-corrosion treatments such as hot-dip galvanizing, electroplating, or anti-rust paint. Existing metal components should be rust-removed and re-coated as necessary. During construction, the thickness and adhesion of the anti-corrosion coating should meet relevant standards, and the coating should be applied evenly without defects such as flaking or bubbles. The humidity and temperature of the construction environment should also be controlled within appropriate ranges to ensure coating performance.

Comprehensive Application of Waterproofing and Anti-Corrosion in Structural Design
During the structural design phase, waterproofing and anti-corrosion measures should be integrated. For example, joint design should not only consider sealing performance but also anti-corrosion treatment, using corrosion-resistant sealing materials. The drainage system should be scientifically and rationally arranged to facilitate drainage while preventing the long-term accumulation of corrosive liquids. The pit cover design must also be waterproof and corrosion-resistant, constructed from corrosion-resistant materials, with a tight seal and easy maintenance considerations. Structural details, such as waterproofing and corrosion-resistant treatment of exhaust vents and ventilation openings, are also crucial. Reasonable structural design helps reduce maintenance burdens and extend the lifespan of the inspection pit.

Key Points of Quality Control in Construction Management
During the construction process, the quality of waterproofing and corrosion-resistant measures has a decisive impact on the final results. Construction companies must strictly adhere to the design and specifications to avoid cutting corners. Construction personnel must receive professional training to master the use of waterproofing and corrosion-resistant materials and construction techniques.
Environmental protection and safety measures should be implemented at the construction site to prevent material contamination and damage. After completion, a detailed quality inspection should be conducted, including water-tightness testing of the waterproofing layer and adhesion testing of the anti-corrosion coating, to ensure that the project meets the expected standards. Material storage and transportation during construction should also comply with regulations to prevent moisture or deterioration that could affect performance.

Maintaining Waterproofing and Anti-Corrosion Measures During Maintenance and Management
After a grounding inspection pit is commissioned, regular maintenance is crucial to ensuring its waterproofing and corrosion resistance. Maintenance work includes inspecting the seals of the pit body and cover, and promptly replacing aging or damaged seals; checking the drainage system for unobstructed flow, and clearing any accumulated water and debris; periodically inspecting the anti-corrosion coating and promptly repairing any peeling. Internal metal parts should be inspected to assess corrosion and, if necessary, replaced or reinforced. Detailed records should be kept of maintenance work, forming a long-term monitoring system to promptly identify and address potential hazards.

Waterproofing and corrosion prevention measures for grounding inspection pits involve multiple aspects, including design, materials, construction, and maintenance, requiring a systematic and comprehensive approach. Scientific material selection, rational design, rigorous construction, and ongoing maintenance can effectively minimize the impact of moisture and corrosive media on the inspection pit, ensuring the safe operation of the grounding system. With technological advancements, new waterproofing and corrosion prevention materials and processes are constantly emerging. Design and construction companies should select appropriate solutions based on actual environmental requirements to ensure project quality and longevity.